Thomas Siebel
Founder, Chairman, and Chief Executive Officer, C3.ai · United States
Thomas Siebel is the CEO of C3.ai (AI). Siebel is based in the United States. Siebel was born in 1952 in Chicago and educated at Shattuck-Saint Mary's School and University of Illinois Urbana-Champaign.
Thomas M. Siebel founded Siebel Systems and is now founder, chairman, and CEO of C3.ai, an enterprise AI software platform company. Born in Chicago in 1952, he holds degrees from the University of Illinois including a BA in history, MBA, and MS in computer science.
Recent developments
AI summary of recent coverageRecent coverage of Thomas Siebel has focused on his return as CEO of C3.ai in May 2026, less than a year after stepping down amid the company's operational challenges and declining revenue. The headlines also document several significant stock sales by Siebel over the past year, including transactions totaling millions of dollars. Additionally, coverage has centered on C3.ai's earnings calls and the company's focus on enterprise artificial intelligence applications during a period of business restructuring.
Summarized from the headlines below; see each source for the full story.
Key Facts
Source: Wikidata ↗- Born
- November 20, 1952 · Chicago
- Citizenship
- United States
- Education
- Shattuck-Saint Mary's School, University of Illinois Urbana-Champaign
Our coverage
On CEOInsider
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Thomas Siebel: FAQ
- Who is Thomas Siebel?
- Thomas Siebel is the Founder, Chairman, and Chief Executive Officer of C3.ai, based in United States.
- What company does Thomas Siebel lead?
- Thomas Siebel is CEO of C3.ai.
- Where was Thomas Siebel educated?
- Thomas Siebel studied at Shattuck-Saint Mary's School, University of Illinois Urbana-Champaign.